Doc D shows that even though almost everyone is oppositional to the syrian regime everyone is stuck fighting each other so this conflict will not rest, the only peace is between the kurds and the syrian rebels. In Doc E it states that Isis a very dangerous terrorist group is joining the war not to fight for or defend a group but to fight to take down governments that they don't agree with. It is also shown in document E that Isis is also as hated as the regime in this war. The ongoing escalation of this war is troubling and other countries should stop entering so the war won't be able to infect more major countries.
The death toll in syria is already huge for these countries if more countries get involved then those numbers could be our own people. In document A it shows a pie chart showing 38,582 of the people who died were foreigners. Document C shows that “at least six people have been killed in a wave of sectarian bloodshed” showing that innocents can die in these wars along with the professional soldiers. These show that if people of these countries can die for no good reason